The signal jammer emits a signal on the same frequency as the cell phone, and with enough power that the two signals collide and cancel each other out. Since the phone automatically increases power when it encounters light interference, the jammer must be able to recognize the phone's power increase and increase the power accordingly. A cell phone is a full-duplex device, which means it uses two separate frequencies for speech and hearing. Some jammers only block one frequency, but they also have the effect of blocking two frequencies at the same time. Since the mobile phone can only receive one frequency at this time, it will be mistaken for the mobile phone to have no service.
Every year during the college entrance examination, the school will have network problems such as mobile phone disconnection and slow network speed. That's because the school has cell phone jammers on. If we think of a cell phone as a handheld two-way radio, radios can be jammed, and cell phones are no exception. Like any radio, your cell phone's signal is subject to interference. Interfering with a cell phone is like interfering with any other type of radio communication. Cell phones communicate with their serving network through base stations.
Like all radios, the signal can be blocked or interfered with. Interfering with a cell phone is the same as interfering with other types of wireless communications. Cell phones communicate with their serving network through base stations. The base station divides the city into many small areas, called cells. This article will explain how cell phone jammers work and the legalities of their use. As cell phone users drive down the street, signals are transmitted between different base stations. The jamming device emits the same radio frequency as the cell phone, thus interfering with the communication between the cell phone and the base station.
